Details: Fully self-leveling horizontal and vertical rotary laser for internal and external applications. leveling accuracy of 0.1mm/m combined with dewalt durability. multi-voltage compatibility with 9.6 - 18 volt (nicd/nimh/li-on) dewalt battery packs. protected rotary head and weatherproof design deliver job site durability. remote control allows single person operation over long distances. built in beam splitting prism allows easy 90° layout and plumb up applications. the remote control features a manual button to allow the user to tilt the laser plane in the x and y axis. wall mount allows the laser to be attached to a wall for drop ceiling installation. private remote control facility allowing commands only from the owners remote control to operate the rotary laser.